The Addresses and Buildings Key Registry (Basisregistraties Adressen en Gebouwen, BAG) is an automated system which stores information on local addresses and buildings. Dutch municipalities store this data (in Dutch) in the National Facility for Addresses and Buildings (LV BAG). The Land Registry Office (Kadaster) manages the National Facility and makes the data available to governments, companies, institutions and private citizens.
Providing BAG data only once
If a government organisation asks you to provide data that has already been recorded in the BAG, you are not obliged to do so. You have to provide information, such as a change of address, only once to a government organisation. This information should then be available to other government agencies as well.
Using BAG data
You may use the data from the BAG (in Dutch), including all postal codes, without any restrictions. For example, for creating applications (apps) for smartphones or tablets.
Data from the Subsurface Registry
Do you use data relating to subsoil and the subsurface? National and local governments (such as provinces, municipalities and water authorities) are obliged to centrally register any new data. They do so in the National Key Registry of the Subsurface (Basisregistratie Ondergrond, BRO). This registry contains data on:
- the geological make-up of the subsoil
- any underground infrastructure present in an area
- user’s rights of the subsurface
You can easily access information (in Dutch) from the national key registry of the Subsurface.